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Illustration showing optical illusions. It is not always possible to trust the eye to be sure if the lines are prolongations of the other lines. You may need to measure to be sure of your conclusion.

Optical Illusions

Illustration showing optical illusions. It is not always possible to trust the eye to be sure if the…

Illustration showing optical illusions. It is not always possible to trust the eye to be sure if the lines are prolongations of the other lines. You may need to measure to be sure of your conclusion.

Optical Illusions

Illustration showing optical illusions. It is not always possible to trust the eye to be sure if the…

"Proliferous or monstrous Rose, showing the prolongation of the axis beyond the flower. C, calyx transformed into leaves; P. petals multiplied at the expense of the stamens, which are reduced in number; F, colored leaves representing abortive carpels; A, axis prolonged, bearing an imperfect flower at its apex." — Encyclopedia Britanica, 1893

Rose

"Proliferous or monstrous Rose, showing the prolongation of the axis beyond the flower. C, calyx transformed…